Trombone-lock.



A. E. KLINGLER.

TROMBONE LOOK.

APPLICATION FILED MAY 13, 1911.

fill/M111 9 llllllllllm amen W01 Patented Oct. 17, 1911.

w q a z/ Zer ALBERT E. KLINGLER, OF ELKHART, INDIANA.

TROMBONE-LOCK.

Application filed May 13, 1911.

Specification of Letters Patent.

Patented Oct. 17, 1911.

Serial No. 626,938.

To all whom it may concern:

Be it known that I, ALBERT E. KLINGLER, a citizen of the United States, residing at Elkhart, in the county of Elkhart and State of Indiana, have invented new and useful Improvements in Trombone-Locks, of which the following is a specification.

The present invention provides a lock device for securing the sliding parts of musical instruments of which the trombone is representative, the purpose being the provision of a lock which may be removed from the instrument at will and which will not detract from the appearance or tone quality of the instrument whether in position thereon or removed therefrom and which lock will at all times when in position maintain a close fit so as to prevent any rattling or other detracting efiect upon the tone quality of the instrument.

In accordance with this invention the lock comprises essentially a sleeve mounted upon a member of the instrument and having an end portion closely fitting the same and having its opposite end portion screwthreaded to match a screwthread provided upon the member carrying the sleeve, the latter having a lug upon its outer side to engage a corresponding lug upon the inner side of a fixed ring carried by the other member of the instrument and which receives a packing forming a cushion between the two members of the instrument to prevent any noise or appreciable jar when the members come together by a closing movement.

The invention consists of the novel features, details of construction and combination of parts, which hereinafter will be more particularly set forth, illustrated in the accompanying drawing, and pointed out in the appended claims.

Referring to the drawing, forming a part of the specification, Figure 1 is a view in elevation, showing the sliding members of a trombone provided with a lock embodying the invention. Fig. 2 is a detail view similar to Fig. 1 having the rotatable lock sleeve removed and one of the tubes of each of the sliding members omitted. Fig. 3 is an enlarged sectional view, showing the lock in operative position. Fig. 4 is a detail view of part of the member having the ring bearing the locking lug, a portion of the member and the ring being broken away. Fig. 5 is a perspective view of the locking sleeve.

Corresponding and like parts are referred to in the following description, and indicated in all the views of the drawing, by the same reference characters.

The fixed member of the instrument is indicated by the numeral 1 and is provided with rings 2 in which a packing is fitted to form a cushion to prevent the noise or jar when the members come together by a closing movement. The slide member 3 has one of its tubes provided with a screwthread 4 which is located a short distance from the end of the tube and projects outward therefrom. The ring 2 of the tube of the fixed member adapted to slide in the tube having the screwthread 4 has a lug 5 upon its inner side, said lug having its upper face inclined. A sleeve 6 is fitted upon the tube having the screwthread and is provided upon its inner side at one end with a matching screwthread 7 to engage the screwthread 4. The sleeve 6 has its threaded end slightly larger than the opposite or outer end so as to extend over the screwthread4. The outer end of the sleeve 6 is of a diameter to snugly embrace the end portion of the tube beyond the screwthread 4, thereby preventing any vibration or rattle even though the sleeve may not have all of its screwthreaded portion 7 in engagement with the screwthread 4 of the slide tube. The intermediate portion of the sleeve 6 is enlarged and milled to enable a firm grip being ob tained thereon to positively turn the sleeve when required. A lug 8 is located upon the outer side of the sleeve 6 near its outer end and its under face is inclined in an opposite direction to the inclination of the upper face of the lug 5 so as to engage therewith by a wedging action to produce a binding when the lock is in operation and prevent accidental disengagement of the lugs.

The screwthread 4 may be provided upon the tube of the slide member in any manner,

but it is preferred to form the thread upon.

a band 9, which is slipped upon the tube and soldered or otherwise secured thereon. The inner or lower end of the sleeve 6 must be of a size to slip over the band 9 and the inner shoulder formed between the two parts of the sleeve is adapted to engage the outer end of the band 9 and limit the turning of the sleeve'when screwed upon the part 4. When the inner shoulder of the sleeve 6 engages the outer end of the band 9 the sleeve is made secure, thereby preventing casual movement and the engaging of the two lugs 5 and 8 upon closing the slides of the instrument when performing thereon lVhen the player desires to remove the sleeve 6 it may be quickly Withdrawn and laid aside without detracting from the appearance of the instrument or attracting any attention. When the slide members of the instrument are required to be locked the sleeve 6 is turned after the members have been closed to cause the lug S to engage with the lug From the foregoing description, taken in connection with the accompanying drawing, the advantages of the construction and of the method of operation will be readily apparent to those skilled in the art to which the invention appertains, and while I have described the principle of operation of the invention, together with the device which I now consider to be the embodiment thereof, I desire to have it understood that the device shown is merely illustrative, and that such changes may be made when desired as are within theseope of the claims appended hereto.

Having thus described the invention what is claimed as new, is

1. A slide trombone having one of its members provided with a fixed ring having a lug upon its inner side, and a sleeve mounted upon the other member and having a screwthread connection therewith and having 'a lug upon its outer side to engage with the lug of said ring to lock the two members when closed.

2. A slide trombone having one of its members provided with a ring having a lug upon its inner side, and the other member having a raised screwthreaded portion a short distance from its end, and a sleeve having its outer end snugly fitting the outer end of the member having the screwthread and having its inner end enlarged and in ternally screwthreaded to match the said screwthread, said sleeve having a lug upon its outer side to engage the lug of the before mentioned ring to lock the two members when closed.

3. A slide trombone having one of its members provided with a ring having a lug upon its inner side, and the other member having an enlarged portion near its end formed with screwthreads, and a sleeve removably fitted upon the last-mentioned member and having its inner end enlarged and internally threaded to match the screwthreaded portion of the said member and having its outer portion snugly fitting the end of the member beyond the screwthreaded portion, said sleeve having an inner shoulder and provided upon its outer side with a lug to engage the lug upon the before-mentioned ring to lock the members when closed.

In testimony whereof I aflix my signature in presence of two witnesses.

ALBERT E. KLINGLER.

Vitnesses B. F. GEMBERLING, IRA G. KLINGLER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C. 

